How to ease out the retopology works on Blender, like in Zbrush with groups and remesh, for a character you need to animate?
I found the answer with Blender version 2.83. There's a new feature called Face Sets, when remeshing you can tick the box to preserve the face sets in tool layer > Remesh.
But you have to make sure you ticked off "Dyntopo" before, or you won't be able to remesh.